//------------------------------------------------------------------------------ 
//  <copyright file="Utility.h" company="Microsoft Corporation">
// The MIT License (MIT)
// 
// Copyright (c) 2014, Microsoft Corporation
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//  </copyright>
//------------------------------------------------------------------------------
#pragma once

#include "Managed.h"
#include "Resources.h"

namespace res = System::Resources;

namespace Microsoft {
    namespace Robotics {
        namespace Vision {
            namespace Cameras {
				namespace Webcam {

    /// <summary>
    /// Utility class which converts HRESULTS to exceptions.
    /// </summary>
    ref class MediaFoundationUtility
    {
    public:
        /// <summary>
        /// Throws exception corresponding to the hr value
        /// </summary>
        static void ThrowExceptionForHR(HRESULT hr)
        {
            switch (hr)
            {
            case MF_E_INVALIDMEDIATYPE:
                throw gcnew InvalidOperationException(Resources::InvalidMediaType);

            case MF_E_ATTRIBUTENOTFOUND:
                throw gcnew KeyNotFoundException(Resources::AttributeNotFound);

            case MF_E_HW_MFT_FAILED_START_STREAMING:
                throw gcnew InvalidOperationException(Resources::HwMftFailedStartStreaming);

            default:
                Marshal::ThrowExceptionForHR(hr);
            }
        }

        /// <summary>
        ///  This looks up a specified string attribute on an attribute object
        /// </summary>
        ///<params name="pAttributes">The attribute store to read from</params>
        ///<params name="key">The attribute key to look up</params>
        ///<returns>The string representation of the attribute. </returns>
        ///<exceptions> KeyNotFoundException - no attribute was found </exceptions>
        static String^ GetStringProperty(IMFAttributes* pAttributes, REFGUID key);
    };       
}}}}}
